Youtube iFrame接口获取视频列表后如何调用IframeAPIReady函数

<script src="https://www.youtube.com/iframe_api"></script>

<div id="player"></div>

<script>
  var player;
  function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
      height: '390',
      width: '640',
      videoId: 'VIDEO_ID',
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange
      }
    });
  }
</script>

function onPlayerReady(event) {
  event.target.playVideo(); // 播放视频
  // event.target.pauseVideo(); // 暂停视频
}

function onPlayerStateChange(event) {
  if (event.data == YT.PlayerState.ENDED) {
    // 视频播放完成后的操作
  }
}